What is the important geographic feature in southeastern Colombia?

The major geographical features of Colombia include the Magdalena River, Cauca River, Amazon River, Orinoco River, Santa Marta Mountains and the Andean mountain range, which is divided into three regions, namely the Cordillera Occidental, Cordillera Oriental and the Cordillera Central. The capital city of Bogota sits on an elevated plateau in the northern area of the Andes Peaks.